This sizing chart is a guide only and is flexible depending on how you thread your laces. For those you enjoy tight threading, our recommended "untied" versions may be appropriate for tying. For those who enjoy particularly loose threading, a larger length may be more appropriate. It will also depend on the size of the shoe (for example some smaller Ultraboosts would be recommended as 36 inch, but larger ones as 45")

The best way to check a rough appropriate length is to measure the current laces in your shoes.